The SMJ1202 hardened steel gear set fits the AXIAL Racing SMT10 differential and is supplied as a 2pcs internal gear kit. Hardened material improves wear resistance compared with standard gears, which helps maintain correct mesh during higher-load trail runs and spirited scale driving.
Installation follows the usual diff internals procedure: open the diff, swap out the stock internal gears for the SMJ1202 pair, set mesh and backlash, and check that the differential rotates cleanly with original bearings and shims. No additional installation tools are included, so prepare your regular diff tools and a dust-free workspace.
In tuning terms, hardened steel gears are a durability upgrade that preserves power transfer and reliability rather than changing gear ratios. They are best used when stock gears begin to show wear or when increased torque from motor and gearing choices requires stronger internals. Periodic inspection and correct lubrication will keep the mesh operating smoothly.
Use SMJ1202 when upgrading internal diff strength on SMT10 trucks or when building a robust drivetrain focused on longevity.
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